First, PC and Macs shut down the hard disk during sleep, which reduces the heat inside the box. Second, the 622 doesn't do much in the way of 'sleeping' even in standby. You got lucky with your first 622 lasting that long with the way you have it installed. You don't have nearly enough room on the right side to allow for good airflow. You need to correct that. Or you can keep posting and showing why you are right and everyone else that has tried to help is wrong. The only downside is that you will probably keep having these problems with heat. It is your choice.